Finishing machine



Dec. 29 1931. H. E. DOW 1,838,812

FINI SHING MACHINE Filed March 14, 1929 Patented Dec. 29, 1931 UNITEDSTATES PATENT OFFICE HARRY E. now, or BEVERLY, MASSACHUSETTS, ASSIGNOIR,ro warren sHon MA onINEnY conrone'rron, orrArEn-son; NEW JERSEY, Aoonronnrron on NEW.

SEY

rmrsnme MACHINE Application filed March 14, 1929. Serial No. 346,993.

This invention relates to finishing machines and is illustrated asembodied in' a machine for burnishing and polishing soles and heels ofshoes of the type disclosed in United States Letters Patent No. 743,988,granted November 10, 1903, to C. Pease;

The operation of finishing the heel of a shoe consists in applying acoating of melted wax or other polishing material to the sides and rearsurfaces of the heel and subsequently working the wax into the heel andburni'sh ing the heel surface by presenting it to a heated rotatingburnishing tool. The heel is then polished by means of a rapidlyrotating brush or roll. I

It is an object of the present invention to provide improved means forheating a tool adapted for performing heel burnishing op erations. Theinvention is illustrated asap plied to the heating of a burnishing toolof the type disclosed in United States Letters Patent No. 616,432,granted on December 20, 1898, to Z. Beaudry, but, as will be made moreapparent hereinafter, it should be understood that a device embodyingthe invention may be used with any burnishing tool having a similarlyrecessed or overhanging end; i

In accordance with the above object of the invention, one featurethereof as embodied in the illustrated machine comprises a heating unitsupported in uxtaposition to a burnishing tool having a recessed endface and between the tool and the adjacent tool shaft bearing by a meansconstructed and: arranged to direct the air in the recess of the "tool.heat ed by the unit against the adjacent portion of the tool boundingthe recess. As herein illustrated this means comprises a baffle platewhich forms a substantial closure for the recess by being placed injuxtaposition toj the end of the-tool which overhangs the heat ing unit.The air in the recess, which rises as it is heated by the heating unit,is thus hindered from escaping past the end of'the tool. By supportingthe heating unit in juxtaposition tothe tool, a large 'partgof thesurface of the heating unit. is brought into.

close association with that of the tool, thereby to effect an eiiicienttransfer of heat to v the tool from the heating unit.

tool from the shaft.

jecting'from a nearby bearing, there is a likelihood of'the heat fromthe tool being conducted along the shaft rapidly enough to cause it toseize in the adjacent shaft bearing. In order that a minimum quantityofheat shall reach-the tool-shaft bearing'of'the illustrated machine "fromthe heatingunit' and baths plate which supports it, they are spacedslightly from the frame of the machine, therebyto insulate the heatingunit therefrom. As illustrated, the space between the heating unit andbaffle plate, and the frame of'the machine constitutes a. vertical airchannel extending across the hub of the tool and hence the air in thespace is free to rise vertically, as it is heated, about the portion ofthe tool hub and shaft adjacent to the bearing and away from theadjacent toolshaft bearing which is horizontal.

The illustrated heating unit comprises a substantially annularly shapedcoil of sheath-wire which has been found to be an advantageous form ofmaterial foruse as an electrical resistance heating unit. As

it is frequently "desirable to change the burnishing tool in accordancewith the shape of the heels tobe operated upon, it is desirable thattools may be removed easily from,'and replaced on, the shaft withoutinterfering with attachments or'any part of the machine. To this end,and in accordance'with another feature of the invention, the illustratedheating unit, although surrounding the'hub of the tool in juxtapositionto the work'engaging elements thereof, is constructed and arranged toallow the ready removal of the These features, including the detailedconstruction of the illustrated machine, will now be 'more fullydescribed and set forth in the claims and illustrated in 'theaccom:

'panyin g drawings, in which Fig. l is a perspective view ofa part ofthe v machine in which the invention is embodied, Fig. 2 is an axialsectional elevation, and

Fig.3 is a perspective view with the bur nishing -tool removed showingthe heating unit and its mounting.

In the illustrated machine a burnishing tool 10 comprising a pluralityof work engaging elements 12 is adjustably fixed on a rotatable toolshaft 14 by means of a nut 16 which, when threaded into the end of thetool shaft 14, expands the slotted portion of the tool shaft intointimate contact with the bore of a hub 18 of the tool 10. The workengaging elements 12 of the tool are riveted to resilient metallicstrips 20 each of which is fastened to the hub at one end by screws 22and is restrained from excessive outward movement at its opposite end bymeans of a shoulder 24 on the corresponding end of the hub 18. Referencemay be made to the above-mentioned Beaudry patent for a more detaileddescription of the illustrated burnishing tool. I

The tool shaft 14 is journaled in a bush- Eng 26 supported in the frame28 of the machine. The outer extremity of the frame 28 is shouldered toreceive a casing 30 in which connections 32 between the source of powerand a heating unit 34 are housed, as illustrated in Fig. 3. A coverplate 36 (Fig. 1) may be fastened to the casing 30 in any convenientmanner to protect the connections.

The heating unit 34 comprises a resistance 38, the ends of which areconnected to the source of power and which is enclosed in a metallicsheath 40, being insulated therefrom by a refractory mater al 42 whichcompletely fills the sheath. In order to provide a heating unit ofeffieient form, the illustrated heating unit is substantially annular toconform with the substantially annular recess 44 resulting from theindividual recesses'in the several work engaging elements of theburnishing tool which are symmetrisally disposed about the hub 18 of thetool 10. It is to be understood, however, that the sheath wire may bewound into a coil of shape other than that illustrated without departingfrom the scope of the invention, so long as the coil conformssubstantially to the form of the recess in which it is enclosed. Inorder to reduce the tendency of the coil to change its shape, owing toexpansion or contraction on account of the large range of temperature clange to whichit is ordinarily subjected, the coils ofthe heating unitare held together preferably by welding them at several points asindicated at 46.

In order to provide an effective heating unit, the illustrated unit 34has been made in which substantially equal to the extent of the overhangof the inner ends of the worlr engaging elements of the tool, as shownin Fig. 2. The heating unit 34 is also supported in close associationwith the tool by means of a ba'iile plate 48 to which the heating unitis welded, as illustrated at 50, and which in the illustrated machine isfastened to the casing 30 by means of screws 52. In order to insulatethe baflie plate 48 and heating unit from the frame 28, thereby toprevent excessive heating of the adjacent tool shaft bearing, the balileplate 48 which supports the heating unit 34 is spaced slightly from thecasing 30 by means of washers 54. An opening is thus provided beween thebaffle plate and the adjacent portion of the frame in which heated airis free to rise vertically and hence away from the adjacent tool shaftbearing.

Since heels of different shapes require burnishing tools havingcorrespondingly shaped work engaging surfaces, it is desirable that theburnishing tools for use in the illustrated machine may be removed fromand replaced on the tool shaft readily. To this end the heating unit andbaflle plate are so constructed that their inside diameter is enoughgreater than the over-all diameter of the hub 18 across the extremes ofthe screws 22 to allow the hub to pass easily through the heating unitand baffle plate when the tool removed from the shaft 14.

in preparing the machine for use, a suitable burnishing tool is placedon the shaft 14 in juxtaposition to the baffle plate. A substantialclosure of the recess is thus provided by the baflle plate which hindersthe progress of heatedair past the end of the tool and directs it towardthe portion of the tool boiuuling the recess which is adjacent to thework engaging surface thereof. It may be noted that the clearancebetween the heating unit and the adjacent portion of the tool need begreat enough only to allow for the radial movement o the work engagingelements as they are forced toward the axis of the tool by engagement ofthe worlr therewith.

The pcsition of the heating unit on the end the frame 28 may be variedby adjusting -e casing 30 which may be clamped to the lame 28 by anyconvenient means (not he v11); and the temperature of the heatng unitmay be regulated will by varying the current passing through it by meansof any suit-able device such as a rheostat.

It will now be appreciated that the illustrated device furnishes anefficient means for heating a burnishing tool since the heat emittingsurface of the heating unit and the heat absorbing surface of theburnishing tool are relatively large and in juxtaposition. Not only isthe transfer of heat from the heating unit to the JOOl readilyaccomplished, but it may be as readily controlled by any suitable devicesuch as a rheostat and also the baffle plate as used in the illustratedorganization hinders the escape of heated air from the vicinity of thetool and directs it toward the portion of the tool which be heated.

. Having thus described my invention, what claim. as new and desire tosecure by Letters atent of the United States is:

1. In a burnishing machine, shaft rotatably supported in a bearing inthe frame thereof, a tool fixed to said shaft in proximity to thebearing, means between the tool and the bearing for heating said tool,and means for supporting said heating means in juxtaposition to saidtool constructed and arranged to direct the air heated by said unitagainst the adjacent portion of the tool, said heating unit andsupporting means also being spaced fromthe bearing to retard transmission of heat to the bearing.

2. In a burnishing machine, a frame, a rotating shaft journaled in abearing in the frame, a tool comprising a hub fixed to said 'ihaft and awork engaging portion having a recessed end face, means disposed withinthe recess of said tool for heating it, and means for supporting saidheating means cooperating with the adjacent end of said bearing to forman air channel extending across the hub of said tool.

3. In a burnishing machine having a bearc ing and a tool shaft rotatablymounted there in, a tool comprlsing a hub carrylng a part having a workengaging face spaced from said bearing, said hub extending toward saidbearing, means forheating the Work engaging face of said tool, and asupport for said heating means cooperating with the adjacent and of saidbearing to form a vertically disposed air channel extending across thehub of said tool in order to prevent heating of its end acent to thebearing.

i. In a burnishing machine, a rotating shaft journaled in the framethereof, a tool having a recessed end face fixed to said shaft, meanswithin the recess in said tool and surrounding a portion thereof forheating it, and a baffle plate in juxtaposition to said tool forsupporting said heating. means and for substantially closing said recessin the tool, thereby to conduct the heated air therein into contact withsaid tool.

5. In a burnishing machine,- a rotating shaft journaled in the framethereof, a tool con'ngrising a hub adjustably fixed to said shaft andhaving a recessed end face, and a sheath-wire heating unit spaced fromsaid tool but within said recess and surroundlng said hub constructedand arranged to allow the ready removal of the tool from the shaft. A

6. In a burnishing machine, a rotating shaft journaled in the framethereof, a tool comprising a hub adjustably fixed to said shaft andhaving a recessed end face, a sheath-wire heating unit within saidrecess and surrounding said hub, and means for for substantially closingsaid recess whereby the heatedair therein is directed against theadjacent portions of the tool. 7

8. In a burnishing machine, a rotating shaft journaled in the framethereof, a tool comprising a hub adjustably fixed to said shaft, aplurality of work engaging elements fixed to saidhub one end of each ofwhich elements is recessed, and a sheath-wire heating unit enclosed insaid recesses and constructed and arranged to allow the ready removal ofthe tool from the shaft.

9. In a burnishing machine, a rotating shaft journaled in the framethereof, a tool comprising a hub adjustably fixed to said shaft, aplurality of work engaging elements fixed to said hub one end of each ofwhich is recessed, a sheath-wire heating unit in said recesses andsurrounding said hub, and a support for said unit enclosing it withinthe recesses, said heating unit and support being constructed andarranged to allow the ready passage of the hub therethrough whereby'said recesses, and means supporting said heating unit and substantiallyclosing the said recesses, thereby to hinder the escape of the heatedair past the tool.

11. In a burnishing machine, a rotating tool comprising a hub carryingat its outer end a plurality of radially disposed work engaging elementsone end of each of which is recessed,-a heating unit in juxtaposition tosaid tool and partially filling said recesses, and meansfor'substantially closing the space between the heating unit and the adjacent work engaging face of the elements, thereby to hinder the escapeof the heated air past the work engaging elements of the tool, saidmeans also being arranged to expose a portion of the inner end of thetool hub to facilitate its coolmg.

In testimony whereof I have signed my name to this specification.

HARRY E. now.

supporting said heating unit in spaced relation from the frame. V

7 In a burnishing machine, a rotating shaft, journaled-in the framethereof, a tool having a recesed end face, a sheath-wire heating unit injuxtaposition to said tool within said recess, and a baffle plate spacedfrom the frame for supporting said heating unit and CERTIFICATE OFGORREGTIQN.

Patent No. 1,838,812. December 29, 1931.

HARRY E. DOW.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 56, for "which" read width; page 3, line 94, claim it), for themisspelled word "justaposition" read juxtaposition; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 4th day of October, A. I). 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents.

